Recherche avancée

Médias (1)

Mot : - Tags -/ogg

Autres articles (60)

  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

Sur d’autres sites (6285)

  • Problems video playing in some android devices (version 4+) but not in others

    5 juin 2014, par anquegi

    following the settings for video in android developers, http://developer.android.com/guide/appendix/media-formats.html I encoded a video using ffmpeg like this :

    ffmpeg -i gravityTrailer.mp4 -y -f mp4 -vcodec libx264 -profile:v baseline -acodec aac    -strict -2  -profile:a aac_low -b:v 500k -ar 44100 -b:a 128k -ac 2 -r 30 -s 480x360  output_hq.mp4

    which corresponds on sd highquality in table 2 from android developers (link above).

    Then i put this video in a server and use the class android.media.MediaPlayer to reproduce it from that URL like this

    https://cloudapp.somedomain.com/bmftvideos/output_hq.mp4

    The problem is that the video is played on android version 4+

    you can see the video on :
    LG G2,
    Sony xperia S

    you cannot see the video on :
    Samsung galaxy S4,
    BQ (spanish) aquaris 4.5

    And I don not know why

    this is the ffmpeg output :

    ffmpeg version 1.2.6 Copyright (c) 2000-2014 the FFmpeg developers
     built on Mar  5 2014 08:21:01 with gcc 4.8.2 (GCC) 20131212 (Red Hat 4.8.2-7)
     configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r --enable-gnutls --enable-libass --enable-libcelt --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
     libavutil      52. 18.100 / 52. 18.100
     libavcodec     54. 92.100 / 54. 92.100
     libavformat    54. 63.104 / 54. 63.104
     libavdevice    54.  3.103 / 54.  3.103
     libavfilter     3. 42.103 /  3. 42.103
     libswscale      2.  2.100 /  2.  2.100
     libswresample   0. 17.102 /  0. 17.102
     libpostproc    52.  2.100 / 52.  2.100
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x14e5ba0] stream 0, timescale not set
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x14e5ba0] max_analyze_duration 5000000 reached at 5013333 microseconds
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'gravityTrailer.mp4':
     Metadata:
       major_brand     : mp42
       minor_version   : 0
       compatible_brands: mp42isomavc1
       creation_time   : 2013-12-01 03:59:56
       genre           : Trailer
       artist          : Warner Bros.
       title           : Gravity - 2K Trailer
       encoder         : HandBrake 0.9.9 2013051800
       date            : 2013
     Duration: 00:02:27.07, start: 0.000000, bitrate: 20296 kb/s
       Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2048x858, 20149 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
       Metadata:
         creation_time   : 2013-12-01 03:59:56
       Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 153 kb/s
       Metadata:
         creation_time   : 2013-12-01 03:59:56
       Stream #0:2: Video: mjpeg, yuvj420p, 102x150 [SAR 72:72 DAR 17:25], 90k tbr, 90k tbn, 90k tbc
    [libx264 @ 0x1667680] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    [libx264 @ 0x1667680] profile Constrained Baseline, level 3.0
    [libx264 @ 0x1667680] 264 - core 130 r2282 1db4621 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    Output #0, mp4, to 'output_hq.mp4':
     Metadata:
       major_brand     : mp42
       minor_version   : 0
       compatible_brands: mp42isomavc1
       date            : 2013
       genre           : Trailer
       artist          : Warner Bros.
       title           : Gravity - 2K Trailer
       encoder         : Lavf54.63.104
       Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 480x360, q=-1--1, 500 kb/s, 15360 tbn, 30 tbc
       Metadata:
         creation_time   : 2013-12-01 03:59:56
       Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
       Metadata:
         creation_time   : 2013-12-01 03:59:56
    Stream mapping:
     Stream #0:0 -> #0:0 (h264 -> libx264)
     Stream #0:1 -> #0:1 (aac -> aac)
    Press [q] to stop, [?] for help
    frame= 4410 fps= 65 q=-1.0 Lsize=   11154kB time=00:02:27.07 bitrate= 621.3kbits/s dup=885 drop=0    
    video:9062kB audio:1969kB subtitle:0 global headers:0kB muxing overhead 1.115392%
    [libx264 @ 0x1667680] frame I:186   Avg QP:28.41  size:  4446
    [libx264 @ 0x1667680] frame P:4224  Avg QP:29.20  size:  2001
    [libx264 @ 0x1667680] mb I  I16..4: 75.5%  0.0% 24.5%
    [libx264 @ 0x1667680] mb P  I16..4:  7.5%  0.0%  3.6%  P16..4: 23.1%  6.2%  1.8%  0.0%  0.0%    skip:57.7%
    [libx264 @ 0x1667680] final ratefactor: 27.96
    [libx264 @ 0x1667680] coded y,uvDC,uvAC intra: 24.0% 31.9% 8.6% inter: 7.4% 7.6% 0.6%
    [libx264 @ 0x1667680] i16 v,h,dc,p: 58% 15% 13% 14%
    [libx264 @ 0x1667680] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28%  9% 27%  7%  6%  8%  5%  7%  3%
    [libx264 @ 0x1667680] i8c dc,h,v,p: 80%  7% 12%  2%
    [libx264 @ 0x1667680] ref P L0: 84.7%  9.4%  5.9%
    [libx264 @ 0x1667680] kb/s:504.98

  • Could not find tag for codec h264 in stream #2 when trim video and add watermark, music background

    13 août 2020, par Nguyễn Trọng

    I'm doing cut video into chunks, then join them and add watermark and background music with the command below.

    


    "[-y, -i, /storage/emulated/0/WhatsApp/Media/WhatsApp Video/VID-20200726-WA0154.mp4, -i, /storage/emulated/0/FXMotion/.cache/.watermark/logo_watermark.png, -stream_loop, -1, -i, /storage/emulated/0/WhatsApp/Media/WhatsApp Documents/DripReport_-_Skechers_(Lyrics)(MP3_160K).mp3, -filter_complex, [1:v]scale=640/4:-1[logo1];[0:v]trim=0:2.483,setpts=PTS-STARTPTS[v1];[0:v]trim=2.483:7.45,setpts=2.0*(PTS-STARTPTS)[v2];[0:v]trim=7.45:9.933,setpts=PTS-STARTPTS[v3];[v1][v2][v3]concat=n=3:v=1[video];[video][logo1]overlay=main_w-overlay_w-10:main_h-overlay_h-10[vw], -map, [vw], -map, 2, -c:v, libx264, -crf, 23, -preset, veryfast, -shortest, /storage/emulated/0/FXMotion/FXMotion-200810e.mp4, -hide_banner]"


    


    But when running I get the following error :

    


    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/WhatsApp/Media/WhatsApp Video/VID-20200726-WA0154.mp4':\n  
Metadata:
major_brand     : mp4v
    minor_version   : 0
    compatible_brands: mp4vmp42isom\n  Duration: 00:00:09.93, start: 0.000000, bitrate: 2080 kb/s
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, unknown/bt470bg/unknown), 640x352, 2078 kb/s, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:\n      rotate          : 270
    Side data:
      displaymatrix: rotation of 90.00 degrees\nInput #1, png_pipe, from '/storage/emulated/0/FXMotion/.cache/.watermark/logo_watermark.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 335x51, 25 tbr, 25 tbn, 25 tbc
Input #2, mp3, from '/storage/emulated/0/WhatsApp/Media/WhatsApp Documents/DripReport_-_Skechers_(Lyrics)(MP3_160K).mp3':
  Metadata:
    encoder         : Lavf57.56.101
    title           : DripReport - Skechers (Lyrics)
    artist          : DripReport
    album           : DripReport\n  Duration: 00:01:46.06, start: 0.011021, bitrate: 167 kb/s
    Stream #2:0: Audio: mp3, 48000 Hz, stereo, fltp, 160 kb/s
    Metadata:
      encoder         : Lavc57.64
    Stream #2:1: Video: png, rgb24(pc), 400x225, 90k tbr, 90k tbn, 90k tbc (attached pic)
    Metadata:
      title           : attached picture
      comment         : Cover (front)
Stream mapping:
  Stream #0:0 (h264) -> trim (graph 0)
  Stream #0:0 (h264) -> trim (graph 0)
  Stream #0:0 (h264) -> trim (graph 0)
  Stream #1:0 (png) -> scale (graph 0)
  overlay (graph 0) -> Stream #0:0 (libx264)
  Stream #2:0 -> #0:1 (mp3 (mp3float) -> aac (native))
  Stream #2:1 -> #0:2 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help\n[graph 0 input from stream 1:0 @ 0x6f73832bc0] sws_param option is deprecated and ignored
[graph 0 input from stream 0:0 @ 0x6f73832c80] sws_param option is deprecated and ignored\n[graph 0 input from stream 0:0 @ 0x6f73833400] sws_param option is deprecated and ignored\n[graph 0 input from stream 0:0 @ 0x6f73833580] sws_param option is deprecated and ignored
[libx264 @ 0x6f44476300] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x6f44476300] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x6f44476300] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=4 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[graph 2 input from stream 2:1 @ 0x6ed501c380] sws_param option is deprecated and ignored
[mp4 @ 0x6ed53b9a00] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2\n[libx264 @ 0x6f445de500] MB rate (33750000) > level limit (16711680)
[libx264 @ 0x6f445de500] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x6f445de500] profile High 4:4:4 Predictive, level 6.2, 4:4:4, 8-bit\n[libx264 @ 0x6f445de500] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=7 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[mp4 @ 0x6ed53b9a00] Could not find tag for codec h264 in stream #2, codec not currently supported in container\nCould not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:1 --[aac @ 0x6f44478600] Qavg: nan\nConversion failed!",
 
 


    


    i run ffmpeg on :

    


    Device
"os_version" : "10"
"model" : "SM-A217F"
"brand" : "samsung"

    


    


    How to fix it ? thank advance !

    


  • Issue in concatenating two video files using FFMPEG

    12 mai 2014, par intrepidkarthi

    I am trying to concatenate two mp4 files taken from gallery. I am getting issue with process execution failure. I have added the code and the error log. Using the ffmpeg library taken from guardian project.

    I am running this in Samsung Galaxy S3 device.

    The error is thrown in this particular line.

    ProcessBuilder pb = new ProcessBuilder(cmds);
    pb.directory(fileExec);
    Process process = pb.start();  

    When I replace the last line above with this,

    Process process = Runtime.getRuntime().exec("chmod 777 "+cmds.toArray(new String[cmds.size()]));

    It works with out the exception as shown below. But the output doesn’t seem to come.

    File concatenation Code :

       File fileVideoOutput = new File(getApplicationContext()
               .getExternalFilesDir("test") + "hello.mp4");
       fileVideoOutput.delete();

       File fileTmp = getApplicationContext().getCacheDir();
       File fileAppRoot = new File(getApplicationContext()
               .getApplicationInfo().dataDir);

       try {
           FfmpegController fc = new FfmpegController(fileTmp, fileAppRoot);

           ArrayList<clip> listVideos = new ArrayList<clip>();
           Clip clip = new Clip();
           clip.path = video1;
           fc.getInfo(clip);
           clip.duration = clip.duration;
           System.out.println("Clip1 duration " + clip.duration);
           listVideos.add(clip);

           Clip clip2 = new Clip();
           clip2.path = video2;
           fc.getInfo(clip2);
           clip2.duration = clip2.duration;
           System.out.println("Clip2 duration " + clip2.duration);
           listVideos.add(clip2);

           Clip clipOut = new Clip();
           clipOut.path = fileVideoOutput.getCanonicalPath();

           fc.concatAndTrimFilesMP4Stream(listVideos, clipOut, false, false,
                   new ShellUtils.ShellCallback() {

                       @Override
                       public void shellOut(String shellLine) {

                           System.out.println("fc>" + shellLine);
                       }

                       @Override
                       public void processComplete(int exitValue) {

                           if (exitValue &lt; 0)
                               System.err.println("concat non-zero exit: "
                                       + exitValue);
                       }
                   });
       } catch (Exception e1) {
           e1.printStackTrace();
       }
    </clip></clip>

    Error log :

    05-08 11:17:03.765: W/System.err(25209): java.io.IOException: Error running exec(). Command: [ffmpeg, -y, -i, /storage/emulated/0/DCIM/Camera/20140507_155713.mp4, -f, mpegts, -c, copy, -an, -bsf:v, h264_mp4toannexb, /data/data/com.yoyo.videoeditor/cache/0.ts] Working Directory: /data/data/com.yoyo.videoeditor/lib Environment: [VIBE_PIPE_PATH=/dev/pipes, ANDROID_ROOT=/system, EMULATED_STORAGE_SOURCE=/mnt/shell/emulated, LOOP_MOUNTPOINT=/mnt/obb, EMULATED_STORAGE_TARGET=/storage/emulated, ANDROID_BOOTLOGO=1, LD_LIBRARY_PATH=/vendor/lib:/system/lib, EXTERNAL_STORAGE=/storage/emulated/legacy, ANDROID_SOCKET_zygote=9, ANDROID_DATA=/data, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ANDROID_ASSETS=/system/app, ASEC_MOUNTPOINT=/mnt/asec, BOOTCLASSPATH=/system/framework/core.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/sec_edm.jar:/system/framework/seccamera.jar:/system/framework/scrollpause.jar:/system/framework/stayrotation.jar:/system/framework/smartfaceservice.jar:/system/framework/sc.jar:/system/framework/secocsp.jar:/system/framework/commonimsinterface.jar, ANDROID_PROPERTY_WORKSPACE=8,66560, SECONDARY_STORAGE=/storage/extSdCard:/storage/UsbDriveA:/storage/UsbDriveB:/storage/UsbDriveC:/storage/UsbDriveD:/storage/UsbDriveE:/storage/UsbDriveF, ANDROID_STORAGE=/storage]
    05-08 11:17:03.770: W/System.err(25209):    at java.lang.ProcessManager.exec(ProcessManager.java:211)
    05-08 11:17:03.770: W/System.err(25209):    at java.lang.ProcessBuilder.start(ProcessBuilder.java:195)
    05-08 11:17:03.770: W/System.err(25209):    at org.ffmpeg.android.FfmpegController.execProcess(FfmpegController.java:101)
    05-08 11:17:03.770: W/System.err(25209):    at org.ffmpeg.android.FfmpegController.execFFMPEG(FfmpegController.java:71)
    05-08 11:17:03.770: W/System.err(25209):    at org.ffmpeg.android.FfmpegController.execFFMPEG(FfmpegController.java:75)
    05-08 11:17:03.775: W/System.err(25209):    at org.ffmpeg.android.FfmpegController.convertToMP4Stream(FfmpegController.java:657)
    05-08 11:17:03.775: W/System.err(25209):    at org.ffmpeg.android.FfmpegController.concatAndTrimFilesMP4Stream(FfmpegController.java:1107)
    05-08 11:17:03.775: W/System.err(25209):    at com.yoyo.videoeditor.EditorActivity.mergeVideosOld(EditorActivity.java:271)
    05-08 11:17:03.775: W/System.err(25209):    at com.yoyo.videoeditor.EditorActivity.access$0(EditorActivity.java:243)
    05-08 11:17:03.775: W/System.err(25209):    at com.yoyo.videoeditor.EditorActivity$3.onClick(EditorActivity.java:85)
    05-08 11:17:03.775: W/System.err(25209):    at android.view.View.performClick(View.java:4475)
    05-08 11:17:03.775: W/System.err(25209):    at android.view.View$PerformClick.run(View.java:18786)
    05-08 11:17:03.780: W/System.err(25209):    at android.os.Handler.handleCallback(Handler.java:730)
    05-08 11:17:03.780: W/System.err(25209):    at android.os.Handler.dispatchMessage(Handler.java:92)
    05-08 11:17:03.780: W/System.err(25209):    at android.os.Looper.loop(Looper.java:176)
    05-08 11:17:03.780: W/System.err(25209):    at android.app.ActivityThread.main(ActivityThread.java:5419)
    05-08 11:17:03.780: W/System.err(25209):    at java.lang.reflect.Method.invokeNative(Native Method)
    05-08 11:17:03.785: W/System.err(25209):    at java.lang.reflect.Method.invoke(Method.java:525)
    05-08 11:17:03.785: W/System.err(25209):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
    05-08 11:17:03.785: W/System.err(25209):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
    05-08 11:17:03.785: W/System.err(25209):    at dalvik.system.NativeStart.main(Native Method)
    05-08 11:17:03.785: W/System.err(25209): Caused by: java.io.IOException: Permission denied
    05-08 11:17:03.785: W/System.err(25209):    at java.lang.ProcessManager.exec(Native Method)
    05-08 11:17:03.790: W/System.err(25209):    at java.lang.ProcessManager.exec(ProcessManager.java:209)
    05-08 11:17:03.790: W/System.err(25209):    ... 20 more

    Here is my ffmpeg commands as given in the ffmpeg tutorial page.

    ffmpeg -i input1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
    ffmpeg -i input2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
    ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc output.mp4

    FFMPEG library doesn’t seem to be working as expected. When I add commands and create output file using "touch" shell command file is being created. Still I am unable to see the output from ffmpeg as expected.